JPH0647934U - Optical lens hood - Google Patents
Optical lens hoodInfo
- Publication number
- JPH0647934U JPH0647934U JP8683892U JP8683892U JPH0647934U JP H0647934 U JPH0647934 U JP H0647934U JP 8683892 U JP8683892 U JP 8683892U JP 8683892 U JP8683892 U JP 8683892U JP H0647934 U JPH0647934 U JP H0647934U
- Authority
- JP
- Japan
- Prior art keywords
- hood
- main
- extension
- large diameter
- diameter portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 11
- 239000013013 elastic material Substances 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 239000000463 material Substances 0.000 description 11
- 230000004323 axial length Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
Landscapes
- Blocking Light For Cameras (AREA)
Abstract
(57)【要約】
【目的】 主フードに対してエクステンションフードを
連結する光学レンズのフードにおいて、エクステンショ
ンフードを取り付けた際の外観の見栄え低下を防止し、
かつエクステンションフードのガタ付きや脱落を防止す
る。
【構成】 レンズ枠１１に取着される主フード２１の前
端部には大径部２３とネジ部２４を設け、これに連結さ
れるエクステンションフード４１の後端部には主フード
のネジ部２４に螺合されるネジ部４３と、このネジ部が
螺合されたときに主フードの大径部２３に隣接される大
径部４２とを設ける。更に、主フードの大径部２３には
弾性材等で形成されたフード保護カバー３１を嵌合して
おり、エクステンションフード４１を主フード２１に連
結したときに、各フードの大径部２３，４２をフード保
護カバー３１で一体的に覆って両者間の継ぎ目Ｘを覆い
隠す。
(57) [Summary] [Purpose] In the hood of the optical lens that connects the extension hood to the main hood, prevents the appearance of the exterior from being degraded when the extension hood is attached,
In addition, it prevents the extension hood from rattling or falling off. [Structure] A large diameter portion 23 and a screw portion 24 are provided at a front end portion of a main hood 21 attached to the lens frame 11, and a screw portion 24 of the main hood is provided at a rear end portion of an extension hood 41 connected thereto. And a large diameter portion 42 adjacent to the large diameter portion 23 of the main hood when the screw portion is screwed. Further, the hood protection cover 31 formed of an elastic material or the like is fitted to the large diameter portion 23 of the main hood, and when the extension hood 41 is connected to the main hood 21, the large diameter portion 23 of each hood, 42 is integrally covered with the hood protection cover 31, and the seam X between them is covered.
Description
【０００１】[0001]
本考案はスチルカメラ、ビデオカメラ等の光学レンズに用いられるフードに関 し、特にフード長を延長するために用いられるエクステンションフードを有する 光学レンズ用フードに関する。 The present invention relates to a hood used for an optical lens of a still camera, a video camera, etc., and particularly to an optical lens hood having an extension hood used for extending the hood length.
【０００２】[0002]
スチルカメラやビデオカメラに用いられる光学レンズでは、撮影に支障をきた す光の入射を制限するためにフードが設けられる。このフードは、光学レンズの 焦点距離や撮影画角等に応じて適切な長さが設定されるが、レンズ鏡筒の長さや 携帯性等によりフード長に制限を受けることが多い。特に、ズームレンズではレ ンズの焦点距離が変化されるため、短焦点時と長焦点時とで必要とされるフード の長さが相違し、通常は短焦点時に合わせてフードが設けられるため、長焦点時 ではフードが有効に機能されなくなる。 Optical lenses used in still cameras and video cameras are equipped with hoods to limit the incidence of light that interferes with shooting. The hood is set to an appropriate length according to the focal length of the optical lens and the angle of view of the image, but the hood length is often limited by the length of the lens barrel and portability. Especially with zoom lenses, the focal length of the lens changes, so the length of the hood required for short focus differs from that for long focus, and the hood is usually provided for short focus, so The hood will not function effectively at long focus.
【０００３】 このため、従来からエクステンションフードが提案され、主となるフードにこ のエクステンションフードを連結することで、フードの全長を長くし、前記した 問題の解消を図っている。通常、このエクステンションフードは、その基端部に 雄ネジ部を形成しておき、この雄ネジ部を主フードの先端部に設けた雌ネジ部に 螺合させることでその連結を行っている。For this reason, an extension hood has been proposed in the past, and by connecting this extension hood to a main hood, the overall length of the hood is lengthened to solve the above-mentioned problems. Normally, this extension hood is formed by forming a male screw portion at its base end portion and connecting the male screw portion to a female screw portion provided at the tip end portion of the main hood for connection.
【０００４】[0004]
このように、従来のエクステンションフードは、単に主フードに対してネジに より連結する構成であるため、その連結部において主フードとエクステンション フードとの間に継ぎ目が形成されるばかりか、この継ぎ目に隙間が生じ易く、こ の隙間がフード及びレンズの外観を低下させ、更にはカメラ全体の外観の見栄え を低下させる原因となっている。 また、カメラの使用中にエクステンションフードと主フードの各ネジ部の螺合 状態が緩み、エクステンションフードがガタ付いたり、外れてしまうことがある という問題もある。 本発明の目的は、エクステンションフードを連結した際の外観の見栄え低下を 防止するとともに、エクステンションフードのガタ付きや脱落を防止したフード を提供することにある。 In this way, the conventional extension hood is simply connected to the main hood by screws, so not only is a seam formed between the main hood and the extension hood at the connection part, but also this seam. Gaps tend to occur, which reduces the appearance of the hood and lens, and also causes the appearance of the entire camera to deteriorate. There is also a problem that the extension hood may loosen or the extension hood may loosen or come off during use of the camera. An object of the present invention is to provide a hood that prevents the appearance of the extension hood from being deteriorated when the extension hood is connected and prevents the extension hood from rattling or falling off.
【０００５】[0005]
本考案は、主フードの前端部には大径部とネジ部を設け、これに連結されるエ クステンションフードの後端部には主フードのネジ部に螺合されるネジ部と、こ のネジ部が螺合されたときに主フードの大径部に隣接される大径部とを設け、更 に主フードの大径部にはエクステンションフードの大径部を一体的に覆うことが 可能なフード保護カバーを嵌合した構成とする。 このフード保護カバーは弾性材で形成され、主フード及びエクステンションフ ードの外周面にそれぞれ弾接する前端側及び後端側の各開口部と、各フードの大 径部を一体的に覆う中間部とを備える。 According to the present invention, a large diameter portion and a screw portion are provided at the front end portion of the main hood, and a screw portion screwed to the screw portion of the main hood is provided at the rear end portion of the extension hood connected to the main hood. A large-diameter portion adjacent to the large-diameter portion of the main hood when the screw portion of the main hood is screwed is provided, and the large-diameter portion of the main hood may be integrally covered with the large-diameter portion of the extension hood. Possible hood protection cover is fitted. The hood protection cover is made of an elastic material, and has a front end side opening and a rear end side opening that elastically contact the outer peripheral surfaces of the main hood and the extension hood, respectively, and an intermediate part that integrally covers the large diameter part of each hood. With.
【０００６】[0006]
次に、本考案について図面を参照して説明する。図１及び図２は本考案の第１ 実施例を示しており、図１はエクステンションフードを取り付けていない状態の 斜視図であり、図２（ａ）及び（ｂ）はエクステンションフードを取り付けてい ない状態と取り付けている状態のそれぞれの要部の断面図である。これらの図に おいて、カメラＣＡ等の光学レンズＬを内装支持している筒状のレンズ枠１１の 前端部には大径部１２が一体に形成され、この大径部１２の前端側の外周面に雄 ネジ部１３が形成されている。 また、主フード２１は前記レンズ枠１１よりも若干大径の円筒状に形成され、 その後端部の内周面には前記レンズ枠１１の雄ネジ部１３に螺合可能な第１雌ネ ジ部２２が形成される。更に、この主フード２１の前端部の外周面には大径部２ ３が一体に形成され、かつ内周面には第２雌ネジ部２４が形成されている。そし て、前記大径部２４には詳細を後述するフード保護カバー３１が嵌合されている 。 Next, the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention, FIG. 1 is a perspective view of a state in which an extension hood is not attached, and FIGS. 2 (a) and 2 (b) are not attached with an extension hood. It is sectional drawing of each main part of a state and the state which is attached. In these figures, a large diameter portion 12 is integrally formed at the front end portion of a cylindrical lens frame 11 that internally supports an optical lens L such as a camera CA. A male screw portion 13 is formed on the outer peripheral surface. Further, the main hood 21 is formed in a cylindrical shape having a diameter slightly larger than that of the lens frame 11, and a first female screw threadable to the male screw portion 13 of the lens frame 11 is formed on the inner peripheral surface of the rear end portion thereof. The part 22 is formed. Further, a large diameter portion 23 is integrally formed on the outer peripheral surface of the front end portion of the main hood 21, and a second female screw portion 24 is formed on the inner peripheral surface thereof. A hood protection cover 31, which will be described in detail later, is fitted to the large diameter portion 24.
【０００７】 一方、エクステンションフード４１は前記主フードと同径の円筒状に形成され 、その後端部の外周面には大径部４２が一体に形成され、かつこの大径部４２の 後端側の外周面には前記主フード２１の第２雌ネジ部２４に螺合される雄ネジ部 ４３が形成されている。また、前記大径部４２の前端側にはフード外周面を内径 方向に凹設した係止溝４４が形成されている。更に、エクステンションフードの 前端にはゴム材や樹脂材で形成されたフード保護リング５１が嵌合されている。On the other hand, the extension hood 41 is formed in a cylindrical shape having the same diameter as the main hood, and a large diameter portion 42 is integrally formed on the outer peripheral surface of the rear end portion of the extension hood 41. A male screw portion 43 that is screwed into the second female screw portion 24 of the main hood 21 is formed on the outer peripheral surface of the. Further, on the front end side of the large diameter portion 42, a locking groove 44 in which the outer peripheral surface of the hood is recessed in the inner diameter direction is formed. Further, a hood protection ring 51 made of a rubber material or a resin material is fitted to the front end of the extension hood.
【０００８】 前記主フード２１に嵌合されているフード保護カバー３１は、図３に一部を拡 大した破断側面図を示すように、ゴム材或いは軟質樹脂材等の弾性変形可能な材 料で断面形状がコ字状に形成され、その後側の開口部３２の口径φｄは主フード ２１の外周面に圧接される径寸法とされ、前側の開口部３３の口径φＤはエクス テションフード４１に設けた係止溝４４に嵌入される径寸法とされる。また、中 間部３４の内径φＩは前記主フード２１とエクステンションフード４１の各大径 部２３，４２の外径に略等しくされ、かつその軸方向の長さはこれら大径部２３ ，４２の軸方向の長さを合わせた長さに設定されている。 なお、この実施例はフード保護カバー３１の前端部の外径を後端部よりも若干 大径にし、後述するようにエクステンションフード４１の大径部４２へフード保 護カバー３１を被冠する際の作業を容易に行い得るように構成している。The hood protection cover 31 fitted to the main hood 21 is made of an elastically deformable material such as a rubber material or a soft resin material as shown in a partially enlarged side view in FIG. The cross-sectional shape is formed in a U shape, and the diameter φd of the opening 32 on the rear side is a diameter dimension that is pressed against the outer peripheral surface of the main hood 21, and the diameter φD of the opening 33 on the front side is the diameter φD. The diameter dimension is such that it is fitted into the locking groove 44 provided in the. The inner diameter φI of the middle portion 34 is made substantially equal to the outer diameters of the large diameter portions 23, 42 of the main hood 21 and the extension hood 41, and the axial length thereof is larger than those of the large diameter portions 23, 42. The length is set to match the axial length. In this embodiment, the outer diameter of the front end portion of the hood protection cover 31 is made slightly larger than that of the rear end portion, so that the large diameter portion 42 of the extension hood 41 is covered with the hood protection cover 31 as described later. Is configured so that the work of can be performed easily.
【０００９】 このような構成によれば、主フード２１は、後端部の第１雌ネジ部２２をレン ズ枠１１の雄ネジ部１３に螺合させることで、図２（ａ）のようにレンズ枠１１ に対して取着される。この状態では、フード保護カバー３１が主フード２１の前 端部の大径部２３を覆い、主フードの前端部が外力によって破損或いは変形され ることを防止する。 そして、エクステンションフードが必要とされるときには、図２（ｂ）のよう に、エクステンションフード４１の後端部の雄ネジ部４３を主フード２１の前端 部の第２雌ネジ部２４に螺合させて両フードを連結させる。その上で、フード保 護カバー３１の前端開口部３３を外径方向に弾性変形させながらこれを前端方向 に引き出し、かつ前端開口部３３をエクステンションフード４１の大径部４２に 被冠させるように嵌合させ、かつ前端開口部３３を係止溝４４に嵌入させる。According to this structure, the main hood 21 is screwed into the male screw portion 13 of the lens frame 11 by screwing the first female screw portion 22 at the rear end thereof, as shown in FIG. It is attached to the lens frame 11. In this state, the hood protection cover 31 covers the large-diameter portion 23 at the front end of the main hood 21 to prevent the front end of the main hood from being damaged or deformed by an external force. When an extension hood is needed, the male screw portion 43 at the rear end of the extension hood 41 is screwed into the second female screw portion 24 at the front end of the main hood 21, as shown in FIG. 2B. And connect both hoods. Then, the front end opening 33 of the hood protection cover 31 is pulled out in the front end direction while elastically deforming in the outer diameter direction, and the front end opening 33 is capped on the large diameter portion 42 of the extension hood 41. The front end opening 33 is fitted into the locking groove 44.
【００１０】 これにより、エクステンションフード４１と主フード２１の連結部はフード保 護カバー３１によって覆われることになり、両者間に生じる継ぎ目（隙間）Ｘが 外部に露呈されることが防止され、外観の見栄え低下が防止される。また、エク ステンションフード４１と主フード２１の各大径部４２，２３がフード保護カバ ー３１の弾性力によって軸方向に挟持された状態に保たれるため、両者を連結す るネジ部２４，４３の螺合状態が緩んでエクステンションフードがガタ付き、或 いは主フードから脱落されることが防止できる。 なお、エクステンションフードの前端部に嵌合したフード保護リング５１は、 エクステンションフードの前端部を外力による破損や変形から防止する。As a result, the connecting portion between the extension hood 41 and the main hood 21 is covered by the hood protection cover 31, and the seam (gap) X formed between the two is prevented from being exposed to the outside, and the external appearance. Is prevented from being deteriorated in appearance. Further, since the extension hood 41 and the large-diameter portions 42 and 23 of the main hood 21 are held in a state of being sandwiched in the axial direction by the elastic force of the hood protection cover 31, the screw portion 24 that connects them together. It is possible to prevent the extension hood from being loosened or coming off from the main hood due to the loosely screwed state of the screws 43. The hood protection ring 51 fitted to the front end of the extension hood prevents the front end of the extension hood from being damaged or deformed by an external force.
【００１１】 図４は本考案の第２実施例を示し、ここでは内蔵型の主フードを有する光学レ ンズに本考案を適用した例を示している。図４（ａ）及び（ｂ）はエクステンシ ョンフードを取り付けていない状態、図４（ｃ）はエクステンションフードを取 り付けている状態のそれぞれの要部の断面図である。 これらの図において、レンズＬを内装支持している筒状のレンズ枠１１１の前 端部には大径部１１２が一体に形成され、この大径部１１２の前端側の外周面に 第１雄ネジ部１１３が形成され、後端側の外周面に第２雄ネジ部１１４が形成さ れている。FIG. 4 shows a second embodiment of the present invention, in which the present invention is applied to an optical lens having a built-in main hood. 4 (a) and 4 (b) are cross-sectional views of the main part in a state in which the extension hood is not attached, and FIG. 4 (c) is a state in which the extension hood is attached. In these drawings, a large-diameter portion 112 is integrally formed at the front end of a cylindrical lens frame 111 that internally supports the lens L, and the first male member is formed on the outer peripheral surface of the large-diameter portion 112 on the front end side. The screw part 113 is formed, and the second male screw part 114 is formed on the outer peripheral surface on the rear end side.
【００１２】 また、主フード１２１は前記レンズ枠１１１よりも若干大径の円筒状に形成さ れてレンズ枠１１１の外側に嵌合されている。この主フード１２１は２つの筒状 体Ａ，Ｂをネジ１２７によって一体化した構成とされ、後端側の筒状体Ａの後端 部の内周面には前記レンズ枠１１１の第２雄ネジ部１１４に螺合可能な第１雌ネ ジ部１２２が形成され、かつその後端側の内周面にはレンズ枠１１１の外周面に 摺接して主フード１２１を同軸位置に保持するための摺接材、ここではラシャリ ング１２３が付着されている。また、前記主フード１２１の前端側の筒状体Ｂは 筒状体Ａよりも内径を小さくした部分と同径にした部分を有しており、小径に形 成した部分の内周面には前記レンズ枠１１の第１雄ネジ部１１３に螺合可能な第 ２雌ネジ部１２４が形成される。また、同径にした部分の内周面には第３雌ネジ 部１２５が形成されている。そして、前記筒状体Ａと筒状体Ｂを一体化した部分 は外径を他の部分よりも大きくした大径部１２６として構成し、この大径部１２ ６には詳細を後述するフード保護カバー１３１が嵌合されている。Further, the main hood 121 is formed in a cylindrical shape having a diameter slightly larger than that of the lens frame 111 and is fitted to the outside of the lens frame 111. The main hood 121 has a structure in which two cylindrical bodies A and B are integrated by a screw 127, and the inner peripheral surface of the rear end of the cylindrical body A on the rear end side has a second male part of the lens frame 111. A first female screw part 122 that can be screwed into the screw part 114 is formed, and an inner peripheral surface on the rear end side is in sliding contact with the outer peripheral surface of the lens frame 111 to hold the main hood 121 at the coaxial position. A sliding contact material, here, a lashing 123 is attached. Further, the tubular body B on the front end side of the main hood 121 has a portion having the same diameter as the tubular body A having a smaller inner diameter, and the inner peripheral surface of the portion formed to have a smaller diameter. A second female screw portion 124 that can be screwed into the first male screw portion 113 of the lens frame 11 is formed. Further, a third female screw portion 125 is formed on the inner peripheral surface of the portion having the same diameter. The portion in which the tubular body A and the tubular body B are integrated is configured as a large diameter portion 126 having an outer diameter larger than that of the other portion, and the large diameter portion 126 has a hood protection described later in detail. The cover 131 is fitted.
【００１３】 一方、エクステンションフード１４１は前記主フード１２１と略同径の円筒状 に形成され、その後端部の外周面には大径部１４２が一体に形成され、かつこの 大径部１４２の後端側の外周面には前記主フード１２１の第３雌ネジ部１２５に 螺合される雄ネジ部１４３が形成されている。また、前記大径部１４２の前端側 にはフード外周面を内径方向に凹設した係止溝１４４が形成されている。更に、 エクステンションフード１４１の前端にはゴム材や樹脂材で形成されたフード保 護リング１５１が嵌合されている。 前記主フード１２１に嵌合されているフード保護カバー１３１は第１実施例と 同様にゴム材或いは軟質樹脂材等の弾性変形可能な材料で断面コ字状に形成され る。また、詳細な図示は省略するが、その後側の開口径は主フード１２１の外周 面に圧接される径寸法とされ、前側の開口径はエクステションフード１４１に設 けた係止溝１４４に嵌入される径寸法とされる。また、中間部の内径は前記主フ ード１２１の大径部１２６とエクステンションフード１４１の大径部１４２の外 径に略等しくされ、かつその軸方向の長さはこれら大径部１２６，１４１の軸方 向の長さを合わせた長さに設定されている。On the other hand, the extension hood 141 is formed in a cylindrical shape having substantially the same diameter as the main hood 121, and a large diameter portion 142 is integrally formed on the outer peripheral surface of the rear end of the extension hood 141. A male screw portion 143 screwed into the third female screw portion 125 of the main hood 121 is formed on the outer peripheral surface on the end side. Further, on the front end side of the large diameter portion 142, a locking groove 144 is formed in which the outer peripheral surface of the hood is recessed in the inner diameter direction. Further, a hood protection ring 151 made of a rubber material or a resin material is fitted to the front end of the extension hood 141. The hood protection cover 131 fitted to the main hood 121 is made of an elastically deformable material such as a rubber material or a soft resin material and has a U-shaped cross section as in the first embodiment. Although not shown in detail, the opening diameter on the rear side is set to a diameter that is pressed against the outer peripheral surface of the main hood 121, and the opening diameter on the front side is fitted into a locking groove 144 provided in the extension hood 141. It is considered to be a diameter dimension. Further, the inner diameter of the middle portion is made substantially equal to the outer diameter of the large diameter portion 126 of the main hood 121 and the large diameter portion 142 of the extension hood 141, and the axial length thereof is the large diameter portions 126, 141. The length is set to match the axial length of.
【００１４】 このような構成によれば、主フード１２１は、使用しないときには、図４（ａ ）のように前端部の第２雌ネジ部１２４をレンズ枠１１１の第１雄ネジ部１１３ に螺合させることで、レンズ枠１１１の周囲を覆う状態で保持される。この状態 では、フード保護カバー１３１が主フード１２１の前端部の大径部１２６を覆い 、更にレンズ枠１１１の前端部を覆うことで、主フード１２１とレンズ枠１１１ の前端部が外力によって破損或いは変形されることを防止する。 そして、主フード１２１のみを利用する場合には、図４（ｂ）のように、主フ ード１２１の第２雌ネジ部１２４とレンズ枠１１１の第１雄ネジ部１１３の螺合 状態を解除し、かつ主フード１２１を前方に引き出した上で、その後端部の第１ 雌ネジ部１２２をレンズ枠１１１の第２雄ネジ部１１４に螺合させる。これによ り、主フード１２１がレンズ枠１１１の前端側に突出された状態とされ、フード として機能される。With such a configuration, when the main hood 121 is not used, the second female screw portion 124 at the front end is screwed onto the first male screw portion 113 of the lens frame 111 as shown in FIG. 4A. By combining them, the lens frame 111 is held in a state of covering the periphery thereof. In this state, the hood protection cover 131 covers the large-diameter portion 126 at the front end of the main hood 121, and further covers the front end of the lens frame 111, so that the front ends of the main hood 121 and the lens frame 111 are damaged or damaged by external force. Prevents deformation. When only the main hood 121 is used, the second female screw portion 124 of the main hood 121 and the first male screw portion 113 of the lens frame 111 are screwed together as shown in FIG. 4B. After releasing and pulling out the main hood 121 forward, the first female screw portion 122 at the rear end is screwed into the second male screw portion 114 of the lens frame 111. As a result, the main hood 121 is projected to the front end side of the lens frame 111 and functions as a hood.
【００１５】 更に、エクステンションフードが必要とされるときには、図４（ｃ）のように 、エクステンションフード１４１の後端部の雄ネジ部１４３を主フード１２１の 前端部の第３雌ネジ部１２５に螺合させて両フードを連結させる。その上で、フ ード保護カバー１３１の前端開口部を外径方向に弾性変形させながらこれを前端 方向に引き出し、かつ前端開口部をエクステンションフード１４１の大径部１４ ２に嵌合させ、係止溝１４４に嵌入させる。これにより、エクステンションフー ド１４１と主フード１２１の連結部はフード保護カバー１３１によって覆われる ことになり、両者間に生じる継ぎ目Ｘが外部に露呈されることが防止され、外観 の見栄え低下が防止される。また、エクステンションフード１４１と主フード１ ２１の各大径部１４２，１２６がフード保護カバー１３１の弾性力によって挟持 された状態に保たれるため、両者を連結するネジ部１２５，１４３の螺合状態が 緩んでエクステンションフード１４１がガタ付き、或いは主フード１２１から脱 落されることが防止できる。 なお、エクステンションフード１４１の前端部に嵌合したフード保護リング１ ５１は、エクステンションフードの前端部を外力による破損や変形から防止する ことは第１実施例の場合と同じである。Further, when the extension hood is required, as shown in FIG. 4C, the male screw portion 143 at the rear end portion of the extension hood 141 is connected to the third female screw portion 125 at the front end portion of the main hood 121. Screw them together to connect both hoods. Then, the front end opening of the hood protection cover 131 is pulled out in the front end direction while being elastically deformed in the outer diameter direction, and the front end opening is fitted to the large diameter part 142 of the extension hood 141. It is fitted into the stop groove 144. As a result, the connecting portion between the extension hood 141 and the main hood 121 is covered by the hood protection cover 131, the joint X between them is prevented from being exposed to the outside, and the appearance is not deteriorated. It In addition, since the large diameter portions 142 and 126 of the extension hood 141 and the main hood 121 are held in a state of being sandwiched by the elastic force of the hood protection cover 131, the screw portions 125 and 143 that connect them are screwed together. It is possible to prevent the extension hood 141 from loosening or loosening or coming off the main hood 121. The hood protection ring 151 fitted to the front end of the extension hood 141 prevents the front end of the extension hood from being damaged or deformed by an external force, as in the first embodiment.
【００１６】[0016]
以上説明したように本考案は、主フードに設けた大径部と、この主フードに対 して連結されるエクステンションフードに設けた大径部とを一体的に覆うフード 保護カバーを設けているので、主フードとエクステンションフードとの連結箇所 に生じる継ぎ目をフード保護カバーで覆うことができ、継ぎ目が露呈されること による外観上の見栄え低下を防止する。また、フード保護カバーによって主フー ドとエクステンションフードの連結部を挟持するため、エクステシンションフー ドと主フードとの連結が緩むことがなく、エクステンションフードのガタ付きや 脱落を未然に防止することができる効果がある。 As described above, the present invention is provided with the hood protection cover that integrally covers the large diameter portion provided on the main hood and the large diameter portion provided on the extension hood connected to the main hood. Therefore, the seam generated at the connection point between the main hood and the extension hood can be covered with the hood protection cover, and the appearance deterioration due to the exposed seam is prevented. Also, since the connecting part between the main hood and the extension hood is sandwiched by the hood protection cover, the connection between the extension hood and the main hood does not loosen, and it is possible to prevent the extension hood from rattling or falling off. There is an effect that can be.
【図１】本考案の第１実施例におけるエクステンション
フードを取り付けていない状態の一部破断斜視図であ
る。FIG. 1 is a partially cutaway perspective view of a first embodiment of the present invention with an extension hood not attached.
【図２】本考案の第１実施例におけるエクステンション
フードを取り付けていない状態及び取り付けた状態のそ
れぞれの要部の縦断面図である。FIG. 2 is a vertical cross-sectional view of a main part of the first embodiment of the present invention with and without an extension hood attached.
【図３】フード保護カバーの一部を破断した拡大側面図
である。FIG. 3 is an enlarged side view in which a hood protection cover is partially broken.
【図４】本考案の第２実施例におけるエクステンション
フードを取り付けていない状態及び取り付けた状態のそ
れぞれの要部の縦断面図である。FIG. 4 is a vertical cross-sectional view of a main part of the second embodiment of the present invention with and without an extension hood attached.
１１，１１１ レンズ枠 ２１，１２１ 主フード ２４，１２５ 雌ネジ部 ２３，１２６ 大径部 ３１，１３１ フード保護カバー ４１，１４１ エクステンションフード ４２，１４２ 大径部 ４３，１４３ 雄ネジ部 11,111 Lens frame 21,121 Main hood 24,125 Female screw part 23,126 Large diameter part 31,131 Hood protection cover 41,141 Extension hood 42,142 Large diameter part 43,143 Male screw part
Claims (2)
ードに対してエクステンションフードを連結するように
した光学レンズ用フードにおいて、前記主フードの前端
部には大径部とネジ部を設け、前記エクステンションフ
ードの後端部には前記主フードのネジ部に螺合されるネ
ジ部と、このネジ部が螺合されたときに前記主フードの
大径部に隣接される大径部とを設け、更に前記主フード
の大径部には前記エクステンションフードの大径部を一
体的に覆うことが可能なフード保護カバーを嵌合してな
ることを特徴とする光学レンズ用フード。1. An optical lens hood in which an extension hood is connected to a main hood attached to a lens frame of an optical lens, wherein a large diameter portion and a screw portion are provided at a front end portion of the main hood. A threaded portion that is screwed into the threaded portion of the main hood, and a large diameter portion that is adjacent to the large diameter portion of the main hood when the screwed portion is screwed into the rear end portion of the extension hood. A hood protection cover capable of integrally covering the large diameter portion of the extension hood is fitted to the large diameter portion of the main hood.
主フード及びエクステンションフードの外周面にそれぞ
れ弾接する前端側及び後端側の各開口部と、各フードの
大径部を一体的に覆う中間部とを備える請求項１の光学
レンズ用フード。2. The hood protection cover is made of an elastic material,
The optical lens hood according to claim 1, further comprising: front-end-side and rear-end-side openings that elastically contact the outer peripheral surfaces of the main hood and the extension hood, and an intermediate portion that integrally covers the large-diameter portion of each hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8683892U JPH0647934U (en) | 1992-11-26 | 1992-11-26 | Optical lens hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8683892U JPH0647934U (en) | 1992-11-26 | 1992-11-26 | Optical lens hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0647934U true JPH0647934U (en) | 1994-06-28 |
Family
ID=13897958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8683892U Pending JPH0647934U (en) | 1992-11-26 | 1992-11-26 | Optical lens hood |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0647934U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014074820A (en) * | 2012-10-05 | 2014-04-24 | Marumi Koki Kk | Lens cap composed of elastomer and provided with buffer function |
| JP2016136180A (en) * | 2015-01-23 | 2016-07-28 | コニカミノルタ株式会社 | Lens barrel |
| JP2016161726A (en) * | 2015-02-27 | 2016-09-05 | シャープ株式会社 | Light shielding device, autonomous traveling body, and autonomous traveling body system |
| JP2017219819A (en) * | 2016-06-10 | 2017-12-14 | 株式会社シグマ | Accessories that can be attached to the lens barrel |
| JP2023169671A (en) * | 2022-05-17 | 2023-11-30 | 株式会社シグマ | Lens hood |
-
1992
- 1992-11-26 JP JP8683892U patent/JPH0647934U/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014074820A (en) * | 2012-10-05 | 2014-04-24 | Marumi Koki Kk | Lens cap composed of elastomer and provided with buffer function |
| JP2016136180A (en) * | 2015-01-23 | 2016-07-28 | コニカミノルタ株式会社 | Lens barrel |
| JP2016161726A (en) * | 2015-02-27 | 2016-09-05 | シャープ株式会社 | Light shielding device, autonomous traveling body, and autonomous traveling body system |
| JP2017219819A (en) * | 2016-06-10 | 2017-12-14 | 株式会社シグマ | Accessories that can be attached to the lens barrel |
| JP2023169671A (en) * | 2022-05-17 | 2023-11-30 | 株式会社シグマ | Lens hood |
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